"Is his dad Chinese?"
I answered "他的爸爸是华人吗？" and got it wrong. I think it should not be wrong. I think the word "Chinese" can mean two things. It can mean China's people (中国人) or just Chinese people in general (华人). Correct me if I'm wrong, thanks!
我回答了 “他的爸爸是华人吗？”，可是是错的。我觉得 “Chinese” 这个字可以代表中国人和/或华人。如果我说错的话，请指导我，谢谢！
I gave the answer "他爸爸是中国人吗" and it said it was wrong but
in the grammar section it says "for people that you have a close relationship with (e.g. family), and for institutions and organization you are involved with (e.g. work, school), you can choose to leave out the 的".
The grammar gives the example "她哥哥很高兴", that is we don't have to say "她的哥哥很高兴“。
Why is my answer "他爸爸” marked as wrong?